IEC 61504 pdf download Nuclear power plants – Instrumentation and control systems important to safety – Plant-wide radiation monitoring
1 Scope and object
This International Standard provides guidance on the design principles and performancecriteria for computer-based radiation monitoring systems (RMS). such systems are providedto integrate the monitoring of plant-wide processes, effluent streams,and area radiation.
This standard describes the integration of functions including equipment such as thosedescribed in standards lEC 60761-1, IEC 60761-2,IEC 60761-3,IEC 60761-4,IEC 60761-5,IEC 60768, IEC 60910,IEC 60951-1 IEC 60951-2,IEC 60951-3, IEC 60951-4,IEC 60951-5,IEC 61031, and lEC 61250 into a plant-wide digital system.The requirements of system-levelcomponents (central computer，subsystem computers，operator consoles,and inter-connections) are discussed.For detection assemblies,processing units and alarm units， thisstandard contains only the requirements needed to allow connection into the centralizedsystem. The standards referenced above contain the specific requirements for thesecomponents.
This standard provides criteria for the interface between monitors of different safety classes.This standard integrates data processing，storage,optimization，and correlation of data flowand displays.
This standard defines the communication criteria to link distributed radiation monitoringequipment in the plant with an open architecture configuration.This standard does not applyto the design and testing of detection and measurement assemblies and subassembliesexcept as necessary to define the interface with the plant-wide system.
Certain RMS functions, or a complete centralized radiation monitoring system may be entirelyimplemented with direct-connected analogue/relay technology. This standard does not applyto such functions or systems.
The following normative documents contain provisions which,through reference in this text,constitute provisions of this International Standard. For dated references,subsequentamendments to,or revisions of，any of these publications do not apply. However, parties toagreements based on this International Standard are encouraged to investigate the possibilityof applying the most recent editions of the normative documents indicated below.For undatedreferences, the latest edition of the normative document referred to applies. Members of lECand lso maintain registers of currently valid lnternational Standards.
IEC 60050(393):1996,International Electrotechnical Vocabulary (IEV) – Chapter 393:Nuclearinstrumentation – Physical phenomena and basic concepts
IEC 60050(394):1995,International Electrotechnical Vocabulary (IEV)- Chapter 394: Nuclearinstrumentation – Instruments
IEC 60761-1，Equipment for continuously monitoring radioactivity in gaseous effluents -Part 1: General requirements
IEC 60761-2，Equipment for continuously monitoring radioactivity in gaseous effluents -Part 2: Specific requirements for aerosol effluent monitors
IEC 60761-3，Equipment for continuously monitoring radioactivity in gaseous effluents -Part 3: Specific requirements for noble gas effluent monitors
IEC 60761-4，Equipment for continuously monitoring radioactivity in gaseous effluents -Part 4 : Specific requirements for iodine monitors
IEC 60761-5，Equipment for continuously monitoring radioactivity in gaseous effluents -Part 5: Specific requirements for tritium effluent monitors
IEC 60761-6,Equipment for continuously monitoring radioactivity in gaseous effluents -Part 6: Specific requirements for transuranic aerosol effluent monitors
IEC 60768,Process stream radiation monitoring equipment in light water nuclear reactors fornormal operating and incident conditions
IEC 60780,Nuclear power plants – Electrical equipment of the safety system – Qualification
IEC 60880,Software for computers in the safety systems of nuclear power stations
IEC 60910，Containment monitoring instrumentation for early detection of developingdeviations from normal operation in light water reactors